Re: Mini coil earth?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: dhmccauley-at-spacecatlighting-dot-com 

No problem.  I run my minicoil using both a 4kV/32mA and a 6kV/30mA NST
using only the house ground (3 prong of plug) for my RF ground with no
problems.
Gary Laus also does this using his 4kV/32mA minicoil.  Any coil under
200-300 watts should be fine using house ground as your RF ground. Above
that, and you should start
looking at a dedicated ground.

Also, I don't use any type of filtering or surge filters.  In fact, I run my
minicoil at work for deskside demonstrations probably every few days when
new people visit or customers
come in etc.  And the outlet I use is connected to both my PC and UNIX work
computers.  No problems whatsoever, at least not yet!

The Captain



 > I would like to build a portable mini coil that can be used for indoor
 > demonstrations, where an RF earth is not available.
 >
 > Is there a way to safely operate a mini coil (NST 6kV 30mA supply) using
 > only the building earth?
 >
 > The bulk of a twin system is too much to be really portable, and a bipolar
 > system is not the sort of effect I am after.
 >
 > I suppose a decent surge filter could do the job of filtering transients
and
 > RF from the mains, but would there still be a potential rise on the
building
 > earth, and could this cause problems if other nearby equipment is
connected
 > to (say) a dedicated telecommunications earth?
 >
 > Any other suggestions?
 >
 >
 >
 >
 >